Better support different kernel hand-offs. When loaded directly

from U-Boot, the kernel is passed a standard argc/argv pair.
The Juniper loader passes the metadata pointer as the second
argument and passes 0 in the first. The FreeBSD loader passes
the metadata pointer in the first argument.

As such, have locore preserve the first 2 arguments in registers
r30 & r31. Change e500_init() to accept these arguments. Don't
pass global offsets (i.e. kernel_text and _end) as arguments to
e500_init(). We can reference those directly.

Rename e500_init() to booke_init() now that we're changing the
prototype.

In booke_init(), "decode" arg1 and arg2 to obtain the metadata
pointer correctly. For the U-Boot case, clear SBSS and BSS and
bank on having a static FDT for now. This allows loading the
ELF kernel and jumping to the entry point without trampoline.

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/powerpc/booke/pmap.c b/sys/powerpc/booke/pmap.c
index 4a279af..aff7901 100644
--- a/sys/powerpc/booke/pmap.c
+++ b/sys/powerpc/booke/pmap.c
@@ -943,7 +943,7 @@ pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va)
 /**************************************************************************/
 
 /*
- * This is called during e500_init, before the system is really initialized.
+ * This is called during booke_init, before the system is really initialized.
  */
 static void
 mmu_booke_bootstrap(mmu_t mmu, vm_offset_t start, vm_offset_t kernelend)